<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=
    , initial-scale=1.0">
    <title>创建Refs</title>
    <link rel="shortcut icon" href="../images/favicon.ico" type="image/x-icon">
</head>
<body>
    <div id="test">

    </div>
    <script type="text/javascript" src="../js/react.development.js"></script>
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <script type="text/javascript" src="../js/babel.min.js"></script>
    <!-- 引入prop-types, 用于对组件标签进行限制 -->
    <script type="text/javascript" src="../js/prop-types.js"></script>

    <script type="text/babel">
        class Demo extends React.Component {

            myRef = React.createRef()

            showData1 = () => {
                alert(this.myRef.current.value)
            }

            render() {
                return (
                    <div>
                        <input ref={this.myRef} type="text" placeholder="点击按钮提示数据"/>
                        <button onClick={this.showData1} >点我提示左侧数据</button>
                    </div>
                )   
            }
        }

        ReactDOM.render(<Demo/>, document.getElementById("test"))
    </script>
</body>
</html>